Change error message when inactive in callCallablePoint

[da1suk8]

Make it easy to understand Inactive

wasmd/x/wasmplus/keeper/api.go

Lines 25 to 27 in d6ea9ec

	if a.keeper.IsInactiveContract(*a.ctx, contractAddr) {
	return nil, 0, fmt.Errorf("called contract cannot be executed")
	}